The American tennis star made it into the top 10 of the world rankings for the first time in his career in November, after winning his first ATP World Tour Masters 1000 title in Paris.
And while Jack Sock’s girlfriend is usually one of his biggest supporters, the American stunner appeared bored as he trained at Perth Arena on Thursday.
Michala Burns did little to show her enthusiasm as she watched her beau work up a sweat.
Better places to be? American tennis player Jack Sock trains in Perth while his girlfriend Michala Burns looks bored on the sidelines on Thursday
The 25-year-old athlete appeared to be squeezing in a last-minute training session ahead of his match against Roger Federer that evening.
Watching on from the sidelines, Michala rarely flashed a smile as her partner ran up and down the court.
The blonde beauty cut a casual figure in jeans, a black top and leopard-print flats.
Working up a sweat: The 25-year-old athlete appeared to be squeezing in a last-minute training session ahead of his match against Roger Federer that evening
Keeping it casual: Watching on from the sidelines, Michala rarely wore jeans, a black top and leopard-print flats
She added a glam flair to her look by accessorizing with large tortoise-shell sunglasses, bracelets and a large silver tote.
Michala also slung a denim jacket over her bag as she walked towards the undercover seating area.
Her slender figure was highlighted in the ensemble, with her taut stomach being flashes as her midriff top moved in the breeze.
Blonde beauty: She added a glam flair to her look by accessorizing with large tortoise-shell sunglasses, bracelets and a large silver tote
Her locks were placed up in a stylish ponytail.
While seated, she appeared to fidget and look around.
Despite appearing bored, Michala wasn’t seen reaching for her phone during the outing.
Taut-al babe! Her slender figure was highlighted in the ensemble, with her taut stomach being flashes as her midriff top moved in the breeze
Later that day, Jack went head-to-head with Roger Federer in front of a record crowd at the Hopman Cup at Perth Arena.
Federer beat Sock 7-6 (7-5) 7-5 in the very tight match.
The competitive players enjoyed friendly banter on the court, with Federer even running to assist Sock after he took a tumble.
Training: Later that day, Jack went head-to-head with Roger Federer in front of a record crowd at the Hopman Cup at Perth Arena
For the fans: Jack signed tennis balls for fans at the court, but later lost his match to Federer
Loved-up: The couple made their relationship known on social media in August, 2017
Jack’s next tournament will be in Auckland, where his girlfriend Michala is sure to join.
The couple made their relationship known on social media in August, 2017.
Since then, they’ve already pronounced their love for each other online, and often refer to each other in the third person with joint pet name ‘Burnock’.
Going strong: Since then, they’ve already pronounced their love for each other online, and often refer to each other in the third person with joint pet name ‘Burnock’
Next match: Jack’s next tournament will be in Auckland, where his girlfriend Michala is sure to join